
User Interviews
UserTesting.com
Respondent
Hotjar
UserZoom
Survicate
Validately
dscout Sprint
Codechef
HackerRank
AlgoExpert.io
CodeForces
LeetCode
Coderbyte
Interview Cake
Codewars
CodeChef is a not-for-profit educational initiative started by Directi more than a decade ago. We started with a dream of seeing an Indian team winning a gold medal at the ACM ICPC World Finals. In its quest for the same, CodeChef has built a self-driven community of the world's best programmers. Today more than 1.3 million competitive programmers from 180+ countries learn from CodeChef. CodeChef has been hosting monthly programming contests regularly for 10 years now. Its platform has assessed 92 million+ code submissions to date, and over 30000 organizations are being impacted by CodeCheffers worldwide. It also organizes SnackDown - one of the world's largest global programming competition whose last edition drew participation from 140+ countries. Since 2017, CodeChef has started providing India's only industry-ready certification in Data Structures and Algorithms, and 1800+ programmers have been certified under the same.
User Interviews
CodechefBased on our record, User Interviews should be more popular than Codechef. It has been mentiond 17 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
If you have a bit more budget, you can also recruit participants from online panels (like userinterviews.com or respondent.io). For an incentive, you can screen the right people to participate in your playtest. Keep in mind you will need to do some vetting and make sure you're not getting "professional" participants. Source: over 3 years ago
I used userinterviews.com recently for a really specific type of targeted user and was impressed with their ability to get folks. It isn't cheap, and I don't know if it would work in other cases, but I would suggest checking it out. Source: over 3 years ago
Userinterviews.com is where we typically go, but it's still costly (~75 per participant, depending on recruiting needs). Source: over 3 years ago
Hey! Does anyone have experience with userinterviews.com for getting feedback? Wondering if the price is worth it for validating my idea and talking with users who fit my target profile. Are there any other good options? Source: over 3 years ago
PMs constantly pay people to do interviews with them, via usertesting.com, userinterviews.com, etc. Not sure if I'm missing something here. Source: almost 4 years ago
Have you heard of codeforces.com, atcoder.jp, codechef.com, etc? Source: over 2 years ago
Leetcode is good to learn basic algorithms because problem statements are usually straightforward. Competitive programming has much wider range of problems. Most popular sites for cp are codeforces.com , atcoder.jp, codechef.com . Source: over 2 years ago
Learn Java with hands-on experience. I personally used codingbat.com a lot, but I've heard good things about codechef.com, which appears to even have a competitive option. Source: over 3 years ago
For practicing algorithms, use any of the freely available websites like https://hackerrank.com https://codechef.com https://projecteuler.net A structured set of practice problems are available at https://www.interviewbit.com/courses/programming/ Avoid https://geeksforgeeks.org because it has a ton of material but very poor quality control. Source: about 4 years ago
These all have sample problems to solve Hackerrank.com edabit.com codewars.com codechef.com and there are tons more. Best of luck to you. I am at about the same level myself. I really like these sites. Source: over 4 years ago
UserTesting.com - Usability testing has never been easier. Get videos of real people speaking their thoughts as they use websites, mobile apps, prototypes and more!
HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
Respondent - Respondent helps you find any target audience in the world for in-person and remote research studies across all research methods including interviews, focus groups, surveys, and more. Respondent works with any research tool you already use.
AlgoExpert.io - A better way to prep for tech interviews
Hotjar - The #1 Leader in Heatmaps, Recordings, Surveys & More. Sign up for a 15-day free trial and start learning from real user behavior today!
CodeForces - Programming competitions and contests, programming community.